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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Gas-liquid mass transfer A comparison of down- and up-pumping axial flow impellers With radial impellers
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Gas-liquid mass transfer A comparison of down- and up-pumping axial flow impellers With radial impellers

机译：气液传质下，上泵轴向流叶轮与径向叶轮的比较

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摘要

The performance of a down- and up-pumping pitched blade turbine and A315 for gas-liquid dispersion and mass transfer was evaluated and then compared with that of Rushton and Scaba turbines in a small laboratory-scale vessel.The results show that,when the axial flow impellers are operated in the up-pumping mode,the overall performance is largely improved compared with the down-pumping configuration.Compared with the radial turbines,the up-pumping A315 has a high gas handling capacity,equivalent to the Scaba turbine,and is economically much more efficient in terms of mass transfer than both turbines.On the other hand,the up-pumping pitched blade turbine is not as well adapted to such applications.Finally,the axial flow impellers in the down-pumping mode have the lowest performance of all the impellers studied,although the A315 is preferred of the pitched blade turbine.
机译：在一个小型实验室规模的容器中，评估了上下泵送变桨叶片涡轮和A315在气液分散和传质方面的性能，然后将其与Rushton和Scaba涡轮的性能进行了比较。结果表明，当轴流式叶轮在上泵模式下运行，与下泵配置相比，整体性能大大提高。与径向涡轮相比，上泵A315具有较高的气体处理能力，相当于Scaba涡轮，另一方面，上泵送变桨叶片式涡轮机不适用于此类应用。最后，在下泵送模式下的轴流式叶轮具有在所有研究过的叶轮中性能最低，尽管A315是变桨叶片涡轮机的首选。

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